Eisenia fetida, commonly known as the red wiggler worm, is a species of earthworm that thrives in compost and organic matter. These worms are known for their ability to break down organic waste, making them essential for composting processes. They are typically reddish-brown in color and can grow up to 4 inches long. These worms are often used in vermicomposting, a method of composting that utilizes worms to convert kitchen scraps and yard waste into nutrient-rich fertilizer. Eisenia fetida is particularly favored for its rapid reproduction and efficiency in processing organic material, contributing to soil health and sustainability.